CN105138796A - Modal tire modeling method for whole-vehicle vibration noise simulation - Google Patents
Modal tire modeling method for whole-vehicle vibration noise simulation Download PDFInfo
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Abstract
The invention relates to a modal tire modeling method for whole-vehicle vibration noise simulation. Under set loads and tire pressure, an accurate tire finite element model is obtained through the actual structure and size and material property of a tire, the tire finite element model is converted into a tire reduction model for whole-vehicle linear analysis through reduction, the tire reduction model and the whole-vehicle NVH finite element model are matched, and therefore the tire model and vibration noise performance simulation are conducted in NASTRAN software, and a new method is provided for road vibration noise performance simulation. The modal tire modeling method is an engineering tire modeling method, and by automatically reducing the tire integrated finite element model, an engineer can establish the tire finite element model through the tire modeling method; meanwhile, the modal tire model for whole-vehicle vibration noise virtual simulation is obtained through an automatic reduction program, and the key technology for stimulating inside-vehicle vibration noise virtual simulation on a road surface is achieved.
Description
Technical field
The present invention relates to a kind of mode tire modeling method for the emulation of car load vibration noise, belong to mode tire modeling technique field.
Background technology
When automobile at the uniform velocity travels with certain speed on the road surface of relative coarseness, the excitation produced by road roughness is delivered in body construction by tire, in car, finally produce the response of vibration and noise.Due to tire self-characteristic, in road excitation transmittance process, encourage and can be filtered or amplify through tire, therefore the structure of tire have impact on the NVH performance of car load under road excitation to a great extent.In emulation field, when carrying out car load vibration and noise simulation calculation by the mode loading road roughness spectrum, just need to set up tire model accurately, thus meet the transmission impact of tire construction road pavement excitation.But due to tire self composition relative complex, tire detailed finite meta-model element number is more, tire is the state of inflation, carrying, ground connection under automobile running working condition simultaneously, tire detailed finite meta-model under this state will carry out the linear calculating of vibration noise performance after assembling with whole vehicle model, in fact this analysis is the linear calculating carrying out small deformation on the basis of structure large deformation, is therefore difficult to realize above-mentioned analysis based on traditional detailed finite meta-model.
In engineering, domestic R & D Enterprises adopts rigidity tire to replace true tire model usually, true tire is simplified to rigid structure by rigid element by rigidity tire, object is ignored the coupling of tire road pavement excitation, and this is also the simplification roughly done to carry out car load NVH performance evaluation.At present some enterprises are in order to evade mode tire, then consider the mode of being composed by core wheel loaded load simulate car load road excitation under vibration and noise performance.But this method exists drawback in product development process, CAE technical feature can not be realized the advantage of control early stage in product development.In addition if public announcement of a patent application is number in the method based on drum dynamometer test data predicting tire flat road surface mechanical characteristics disclosed in CN104390794A, utilize ABAQUS software to testing tire modeling, and emulate it respectively interior, motion on outer drum road surface, with interior, outer drum test bed testing data revise tire model simultaneously, and with revised accurate tire model emulate in flat road surface this impose a condition under tire motion, predict its flat road surface mechanical characteristic, the program only adopts drum dynamometer test data just effectively can be eliminated the impact of road surface curvature by finite element technique, obtain the mechanical characteristic of tire on level road, and a kind of vertical sliding test method eliminating longitudinal force of tire skew disclosed in public announcement of a patent application CN104236929A, the slip rate of effective rolling radius Control experiment process when adopting tire drag to be zero condition, realize tire and indulge the longitudinal force of sliding characteristic and slip rate relation curvature by (0,0) point, when utilizing the test figure without longitudinal force skew to set up tire experience or semiempirical longitudinal force model, horizontal-shift and vertical shift need not be considered in a model, reduce model parameter and then simplify tire modeling.
Calculate to carry out car load NVH performance, need to set up a kind of tire model modeling method for the emulation of car load vibration noise, at present in Automobile Enterprises, the simulation of car load vibration and noise performance is carried out usually in commercialization software NASTRAN, and the finite element tire model that the tire model with nonlinear characteristic can be set up in ABAQUS software realizes reduction, both comprised mechanics of tire characteristic, accessible site passes through the mode tire of NASTRAN software simulating vibration noise simulation calculation in car load finite element model again.
Summary of the invention
The object of the present invention is to provide a kind of mode tire modeling method for the emulation of car load vibration noise, make Simulation Engineering teacher can set up tire model rapidly, and its model is used for effectively road roughness and encourages in the car load vibration & noise virtual emulation caused.
Technical scheme of the present invention is as follows:
A kind of mode tire modeling method for the emulation of car load vibration noise, under its load in setting, tire pressure condition, accurate tire finite element model is obtained by tire practical structures size, material properties, tire finite element model is converted into the tire reduced-order models for car load linear analysis by reduction again, this tire reduced-order models and car load NVH finite element model match, thus realize in NASTRAN software, carry out tire model and vibration noise performance simulation, for road vibration noise performance simulation provides a kind of new method, at least comprise the following steps:
S1, in setting load, under tire pressure condition, according to design geometric parameter, the material behavior of tire, utilize finite element software ABAQUS to the modeling of emulation tire, generate the tire cross-section geometric model in plane;
S2, to be set tire ground connection, tire pressure, the state of assembling with wheel hub by finite element software ABAQUS, in conjunction with the tire cross-section geometric model generated in S1 step, the mechanical characteristic of tire under emulation set condition, draws the tire cross-section finite element model emulating mechanical characteristic under car load assembling operating mode;
S3, tire cross-section finite element model by generating in S2 step, by MATLAB Program Generating tire global finite element model, and obtain the simulation result of tyre mould step response in ABAQUS software;
S4, set up reduction program, by reduction program, model reduction is carried out to the tire global finite element model generated in S3 step and simulation result, obtain the mode tire model after reducing.
Further, the design geometric parameter in S1 step comprises the geological information of all composition structures of inside tires measurable mechanics of tire characteristic, and this composition structure includes wire loop, steel belt, triangle rubber, casing ply, sidewall structure and tyre surface; Material behavior in S1 step comprises the material properties of corresponding described all composition structures.
Further, in S3 step, MATLAB program creation " INPcreater.exe ", in conjunction with the tire cross-section finite element model in S2 step, draws tire global finite element model file.In S4 step, reduction program creation " MTcreater.exe ", the tire global finite element model reduction generated in S3 step is become the mode tire model of mechanical characteristic equivalence, this mode tire model can mate with car load finite element model, thus the car internal vibration noise Simulation of carrying out under road excitation operating mode calculates.
The invention provides a kind of tire modeling method of through engineering approaches, and tire global finite element model is reduced automatically, namely slip-stick artist creates tire finite element model by this tire modeling method, utilize the acquisition of automatic reduction program for the mode tire model of car load vibration noise virtual emulation simultaneously, solve this gordian technique of road excitation car internal vibration noise virtual emulation.
Accompanying drawing explanation
Fig. 1 is method flow diagram of the present invention;
Fig. 2 is tire cross-section finite element model figure in the present invention;
Fig. 3 is tire global finite element illustraton of model in the present invention;
Fig. 4 is the mode tire model figure after reduction.
Description of reference numerals: 1-wheel rim; The overall three-dimensional finite element model of 3-tire; 4-PLOT unit; 5-zero-length quality and spring unit coincide point; 6-MPC unit.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
A kind of mode tire modeling method for the emulation of car load vibration noise, it is characterized in that, in the load of setting, under tire pressure condition, by tire practical structures size, material properties obtains accurate tire finite element model, tire finite element model is converted into the tire reduced-order models for car load linear analysis by reduction again, this tire reduced-order models and car load NVH finite element model match, thus realize in NASTRAN software, carry out tire model and vibration noise performance simulation, for road vibration noise performance simulation provides a kind of new method, at least comprise the following steps:
S1, in setting load, under tire pressure condition, according to design geometric parameter, the material behavior of tire, utilize finite element software ABAQUS to the modeling of emulation tire, generate the tire cross-section geometric model in plane;
S2, to be set tire ground connection, tire pressure, the state of assembling with wheel hub by finite element software ABAQUS, in conjunction with the tire cross-section geometric model generated in S1 step, the mechanical characteristic of tire under emulation set condition, draws the tire cross-section finite element model emulating mechanical characteristic under car load assembling operating mode;
S3, tire cross-section finite element model by generating in S2 step, by MATLAB Program Generating tire global finite element model, and obtain the simulation result of tyre mould step response in ABAQUS software;
S4, set up reduction program, by reduction program, model reduction is carried out to the tire global finite element model generated in S3 step and simulation result, obtain the mode tire model after reducing.
Further, the design geometric parameter in S1 step comprises the geological information of all composition structures of inside tires measurable mechanics of tire characteristic, and this composition structure includes wire loop, steel belt, triangle rubber, casing ply, sidewall structure and tyre surface; Material behavior in S1 step comprises the material properties of corresponding described all composition structures.
Further, in S3 step, MATLAB program creation " INPcreater.exe ", in conjunction with the tire cross-section finite element model in S2 step, draws tire global finite element model file.In S4 step, reduction program creation " MTcreater.exe ", becomes the mode tire model of mechanical characteristic equivalence by the tire global finite element model reduction generated in S3 step.This mode tire model can mate with car load finite element model, thus the car internal vibration noise Simulation of carrying out under road excitation operating mode calculates.
Fig. 1 is implementing procedure figure of the present invention, directly carries out the explanation of specific implementation process according to mode tire modeling method provided by the invention with a tire example.
The first step: according to the cross section geometric information of tire to be analyzed, tire finite element model is created in ABAQUS software, by the center line of tyre contour outline figure in modeling process, the structure only creating tire cross-section half carries out subsequent analysis, and the tire cross-section half model of generation as shown in Figure 2.In structure, wire loop and steel belt are defined as resilient material, and tyre surface, triangle rubber, inner liner and sidewall structure are all defined as elastic material by Neo-Hookean model, and nylon material defines its material properties by Marlow hyperelastic model.
Second step: in order to simulate tyre inflating loading process, utilizes rigid element to set up wheel rim 1 in ABAQUS software, and as shown in Figure 2, rigidity wheel hub is shown as the form of " line " in a model, and with reference to a called after RIM-1_Rim-RP.In order to the convergence contacted, original state wheel rim can not directly contact with tire interface part, therefore wheel rim center move down 12mm.Then set up two analysis step, what first analysis step was corresponding is wheel rim contacts with tire, and namely wheel rim moves up 12mm; In order to simulate gas replenishment process, second analysis step is survey the pressure adding 0.24MPa in tire.Set up symmetry constraint simultaneously, and define the contact relation between wheel rim and tire.In ABAQUS software, carry out stress and strain model to tire cross-section, one dimension unit adopts MGAX1 cell type, and two-dimensional cell chooses CGAX4 or CGAX3 cell type, and adopt unit size 4mm to 8mm to carry out stress and strain model, stress and strain model form as shown in Figure 2.Then choose tire outline point as output point, be follow-up mode tire outline display point, called after configure_node.Grid passes through to create JOB after finishing thus exports corresponding inp file.By ABAQUS software, tire cross-section finite element model is calculated again, obtain the analysis result file of cross section model.
3rd step: full model maker execute file INPcreater.exe is copied in the file at tire cross-section the model calculation place, a dialog box is there is after clicking this execute file, by talking with the empty inp file selecting to generate in tire cross-section model creation process, the inp file that then generation two is new automatically, is respectively half_tire.inp and full_tire.inp.Then full_tire.inp file is edited, by its * MASS, ELSET=RIMMASS parameter is below defined as bead seat quality 0.01074634, by * ROTARYINERTIA, ELSET=RIMROTI parameter is below defined as moment of inertia 2.439663E+02,3.637302E+02,2.444952E+02 of wheel hub, by * CLOAD, OP=NEWRIM-1_Rim-RP, 3 ,-3300.00 rearmost parameters are defined as axle load.Open the command window of ABAQUS again, input following command statement respectively and calculate:
abaqusoldjob＝axi_tirejob＝half_tireint；
abaqusoldjob＝half_tirejob＝full_tireint；
Wherein axi_tire is the tire cross-section model inp file name created, and its title can self-defining according to demand.Obtained the result of calculation of tire full model by mentioned order statement, the overall three-dimensional finite element model 3 of the tire that this process generates, subsequent tyre reduction work is also carried out based on the tire finite element model shown in Fig. 3.
4th step: under mode tire reduction program MTcreater.exe is placed on above-mentioned result of calculation place file, click and run, eject two windows successively, successively full_tire.dat and axi_tire.inp file is selected respectively by its window, program is automatically run and is generated mode tire file modal_tire.bdf, and this file can directly be directed in hypermesh pre-processing software.As shown in Figure 4, this mode tire outer contour shape is characterized by PLOT unit 4 display format of mode tire after reduction in pre-processing software.And core wheel place is zero-length quality and spring unit coincide point 5, this coincide point is connected by the node of MPC unit 6 with outline PLOT unit 4.Mode tire shown in Fig. 4 can assemble with car load NVH model, thus carries out car load vibration noise simulation calculation.
Above content is in conjunction with concrete modeling case detailed description made for the present invention, is understand for the ease of person skilled and apply this modeling method, can not regard as specific embodiment of the invention situation and only be confined to these descriptions.Any those of ordinary skill in the art are in the technical scope that invention discloses, and the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (4)
1. the mode tire modeling method for the emulation of car load vibration noise, it is characterized in that, in the load of setting, under tire pressure condition, by tire practical structures size, material properties obtains accurate tire finite element model, tire finite element model is converted into the tire reduced-order models for car load linear analysis by reduction again, this tire reduced-order models and car load NVH finite element model match, thus realize in NASTRAN software, carry out tire model and vibration noise performance simulation, for road vibration noise performance simulation provides a kind of new method, at least comprise the following steps:
S1, in setting load, under tire pressure condition, according to design geometric parameter, the material behavior of tire, utilize finite element software ABAQUS to the modeling of emulation tire, generate the tire cross-section geometric model in plane;
S2, to be set tire ground connection, tire pressure, the state of assembling with wheel hub by finite element software ABAQUS, in conjunction with the tire cross-section geometric model generated in S1 step, the mechanical characteristic of tire under emulation set condition, draws the tire cross-section finite element model emulating mechanical characteristic under car load assembling operating mode;
S3, tire cross-section finite element model by generating in S2 step, by MATLAB Program Generating tire global finite element model, and obtain the simulation result of tyre mould step response in ABAQUS software;
S4, set up reduction program, by reduction program, model reduction is carried out to the tire global finite element model generated in S3 step and simulation result, obtain the mode tire model after reducing.
2. according to claim 1 a kind of for car load vibration noise emulation mode tire modeling method, it is characterized in that: the design geometric parameter in S1 step comprises the geological information of all composition structures of inside tires measurable mechanics of tire characteristic, and this composition structure includes wire loop, steel belt, triangle rubber, casing ply, sidewall structure and tyre surface; Material behavior in S1 step comprises the material properties of corresponding described all composition structures.
3. according to claim 1 a kind of for car load vibration noise emulation mode tire modeling method, it is characterized in that: in S3 step, MATLAB program creation " INPcreater.exe ", in conjunction with the tire cross-section finite element model in S2 step, draws tire global finite element model file.
4. a kind of mode tire modeling method for the emulation of car load vibration noise according to claim 1 or 3, it is characterized in that: in S4 step, reduction program creation " MTcreater.exe ", becomes the mode tire model of mechanical characteristic equivalence by the tire global finite element model reduction generated in S3 step.
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| CN107818208A (en) * | 2017-10-25 | 2018-03-20 | 东南大学 | A kind of acquisition methods of road table excitation |
| CN109084887A (en) * | 2018-06-01 | 2018-12-25 | 上海大学 | A kind of pruner blade mechanisms noise simulation method |
| CN109649092A (en) * | 2019-01-23 | 2019-04-19 | 合肥工业大学 | The design method of pneumatic tire cavity resonance noise reduction apparatus |
| CN110059364A (en) * | 2019-03-26 | 2019-07-26 | 江苏大学 | A kind of tire cavity resonance noise Simulation test method |
| CN110481555A (en) * | 2018-05-14 | 2019-11-22 | 通用汽车环球科技运作有限责任公司 | It is autonomous to take dynamics comfort level controller |
| CN110688794A (en) * | 2019-09-24 | 2020-01-14 | 青岛科技大学 | Finite element simulation analysis and performance optimization method for inflation-free tire |
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| CN113065272A (en) * | 2021-04-30 | 2021-07-02 | 中国核工业华兴建设有限公司 | Method for rapidly realizing numerical simulation of welding deformation |
| CN113239458A (en) * | 2021-04-26 | 2021-08-10 | 中汽研汽车检验中心（天津）有限公司 | Whole vehicle road noise simulation benchmarking method based on virtual road surface |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105512424B (en) * | 2015-12-22 | 2018-01-26 | 湖南大学 | The method that off-the-road tyre Vertical Characteristic parameter is obtained based on pulse testing |
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| CN107292034A (en) * | 2017-06-23 | 2017-10-24 | 重庆长安汽车股份有限公司 | The in-car vibration noise simulating analysis of road excitation based on Hyperworks and system |
| CN107818208B (en) * | 2017-10-25 | 2021-06-01 | 东南大学 | Road surface excitation obtaining method |
| CN107818208A (en) * | 2017-10-25 | 2018-03-20 | 东南大学 | A kind of acquisition methods of road table excitation |
| CN110481555A (en) * | 2018-05-14 | 2019-11-22 | 通用汽车环球科技运作有限责任公司 | It is autonomous to take dynamics comfort level controller |
| CN109084887A (en) * | 2018-06-01 | 2018-12-25 | 上海大学 | A kind of pruner blade mechanisms noise simulation method |
| CN109649092A (en) * | 2019-01-23 | 2019-04-19 | 合肥工业大学 | The design method of pneumatic tire cavity resonance noise reduction apparatus |
| CN110059364A (en) * | 2019-03-26 | 2019-07-26 | 江苏大学 | A kind of tire cavity resonance noise Simulation test method |
| CN110688794A (en) * | 2019-09-24 | 2020-01-14 | 青岛科技大学 | Finite element simulation analysis and performance optimization method for inflation-free tire |
| CN110688794B (en) * | 2019-09-24 | 2023-05-02 | 青岛科技大学 | Inflation-free tire finite element simulation analysis and performance optimization method |
| CN111993847A (en) * | 2020-08-04 | 2020-11-27 | 中汽研汽车检验中心（天津）有限公司 | Tire parameter optimization method based on whole vehicle road noise performance improvement |
| CN113239458A (en) * | 2021-04-26 | 2021-08-10 | 中汽研汽车检验中心（天津）有限公司 | Whole vehicle road noise simulation benchmarking method based on virtual road surface |
| CN113239458B (en) * | 2021-04-26 | 2022-11-01 | 中汽研汽车检验中心（天津）有限公司 | Whole vehicle road noise simulation benchmarking method based on virtual road surface |
| CN113065272A (en) * | 2021-04-30 | 2021-07-02 | 中国核工业华兴建设有限公司 | Method for rapidly realizing numerical simulation of welding deformation |
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Application publication date: 20151209 |